Glass-pressing mechanism.



NO MODEL.

PATENTED AUG. 9, 1904. F. O'NEILL.

GLASS PRESSING MECHANISM.

KPPLIOATION FILED AUG. 3, 190a.

wnnr 11111111.

I INVENT'DR UNiTEn STaTEs Patented August 9, 1904.

PATENT OEETEE.

FRANK ONEILL, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO DAVID A.GORDON, OF IVALLAOEBURG, CANADA.

GLASS-PRESSENG MECHANISM.

1 SPECIFICATION forming part of Letters Patent No. '76? ,310, datedAugust 9, 1904.

Application 5125. August 3, 1903.

To (all whom, it 77Lf!/ 7/ concern.-

Be it known that I, FRANK ONEILL, a citizen of the United States,residing at Detroit, in the county of \Vayne and State of l\ Iichigan,have invented certain new and useful Improvements in Glass-PressingMechanism, of which the following is a specification, reference beinghad therein to theaccompanying drawings.

Glass-pressing machines operated by other than hand-power are usuallyprovided with means for affording a yielding pressing stroke tocompensate for variations in charges of glass placed in the mold. As themold-cover or spring-plate mechanism is carried by the plunger it yieldstherewith, and hence is less effect- -ive in confining the glass withinthe mold in case of an overcharge than with a right amount. IV hen theexcess is not too great, it should be so confined as to prevent overflowor oozing from the mold-top when the pressure is applied, the plunger insuch case stopping short of a full stroke and leaving the article with athick bottom, but otherwise perfect.

The primary object of the present invention is to provide improved meansfor relieving the mold-cover of the compensating or yielding movement ofthe plunger, whereby the same is so confined as to prevent overfiow andthe consequent formation of an article with an imperfect upper end, asis the case whenever the cover is forced from the mold during thepressing operation.

I have illustrated the invention in connec tion with portions of thepressing mechanism shown in my Patent No. 674E248, May 1 1, 1901.

In the accompanying drawings, Figure 1 is a side elevation, and Fig. 2 afront view, partly in section, of pressing mechanism embodying theimprovements. Fig. 3 is a vertical sectional view, on a larger scale, ofthe plunger mechanism and actuating means. Fig. 1 is a detail view ofone of the spring-depressing bars.

Referring to the drawings, 2 designates the parallel uprights of themachine-frame, which are slotted vertically at 3 to provide ways for theplunger-shaft 1 and plunger-depressing cross-head 5. The latterisoperated by crankarms 6, extending from cams 7,- secured to Serial 110.168,008. (No model.)

shaft 8 at the base of the machine, while the 5 plunger-shaft isoperated by bars 9, provided with rollers 10. which ride on cams 7, allas fully described in my patent above referred to. Gear 11 and slidingrack 12 operate to shift the plungers, also as fully described in said 55 patent.

Secured on shaft 1 is head 13, and projecting radially therefrom arearms 14, carrying at their outer ends plunger-heads 15.

16 represents the cup-shaped mold-covers, which closely fit and aremovable over the inner ends of the plungers, being held normallyprojected by springs 17, coiled around arms 14:.

The inner ends of the springs bear against plates 18, which slide on thesaid arms.

In the present adaptation of the invention two plungers aline throughshaft 4, as in my patent above referred to, so that when one plunger isprojected downward in operative position another plunger is upright andin line with socket 19 on the lower end of rod 20, depending fromcross-head 5, whereby the operative plunger is forced downward for thepressing stroke. Rod 20 is movable through crosshead 5 and is reduced atits upper end at 20, the extremity of this reduced portion being movablethrough plate 21, secured to crosshead 5 by rods 22. A plate 23 rests onthe shoulder of rod 20, formed by reduced portion 20, and confinedbetween this plate and plate 21 are springs 24. IVith this mechanism itwill be understood that the depressing means may be adjusted to afford ayielding or compensating pressing stroke to the operative plunger afterthe same encounters a given or 8 5 predetermined resistance occasionedby an excess of glass in mold 25.

In order to hold mold-cover16 tightlyseated on the mold and prevent itfrom yielding With the plunger,I provide two bars 26 positioned 9 on theinner sides of frame-uprights 2, and at their upper ends provided withlateral projections 27, which are confined in slots 3 and which arepositively engaged by and move with cross-head 5. The lower portions ofthese bars are enlarged and formed with oblong openings 28 to looselyembrace the reduced end portions 13 of head 13. On the inner sides ofthe lower extremities of the 1 position spring-plate 18 thereof ispositioned beneath and positively engaged by said bar pro ections. Thusa positive connection 1s had between the spring of the moldcover anddepressing cross-head 5, so that even though the plunger yields slightlyand stops short of a full pressing stroke, as shown in Fig. 3, themold-cover spring is held in the position it would have if the strokewere full. Thus the mold-cover is most positively and strongly held justat the moment the unseating pressure of the glass within the mold isgreatest. Escape of the molten glass is thus prevented, and the articleis pressed with a perfect upper end.

\Vhile the invention is here shown and described in connection with mypatented pressing mechanism, it will be understood that the same may beapplied to various forms of glasspressing machines without departingfromthe spirit or scope of the invention.

I claim as my invention--- 1. In a glass-pressingmachine, averticallyreciprocating and revoluble plunger, actuating means havingyielding connection with the plunger for reciprocating it, mold-covermechanism constructed and arranged to cooperate with the revolubleplunger when thelatter is in operative position, and means forpositively reciprocating the mold-cover mechanism.

2. In a glass-pressing machine, a verticallyreciprocating and revolubleplunger, actuating means having yielding connection with the plunger foractuating it,moldcover mechanism revolublc with the plunger and adapt edto reciprocate independently thereof, and means for positivelyreciprocating said mechanism.

3. In a-glass-pressing machine, averticallyreciprocating and revolubleplunger, moldcover mechanism revoluble With the plunger and adapted toreciprocate independently thereof, and actuating means common to theplunger and said mechanism for reciprocating them and adapted toyieldingly connect with the plunger and positively connect with themold-cover mechanism.

4L. In a glass-pressing machine, a rotatable and vertically-movableplunger-carrying head, plungers projecting therefrom, a depressing-headadapted to impart a yielding downward movement to the plunger-carryinghead, bars at opposite sides of the latter and movable independentlythereof and adapted to be depressed by the depressing-head, a moldcovermovable over each plunger, a spring for holding each cover normallyprojected, and means whereby as each spring is brought to pressingposition it is engaged by said bars.

5. In a glass-pressing machine, a rotatable and vertically-movableplLinger-carrying head, plungers projecting therefrom, a depressing-headadapted to impart a yielding downward movement to the plunger-carryinghead, bars at opposite sides of the latter and movable independentlythereof and adapted to be depressed by the depressing-head, projectionson the inner sides of the bars, a moldcover movable over each plunger. aspring for holding each cover normally projected, and a plate carried byeach spring adapted to be engaged by the said bar projections when thecorresponding plunger is in pressing position.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK ONEILL.

l/Vitnesses:

GUY C. NEARING, LINNIE MoRRIsoN.

